Heel-nailing machine



G. M. PETTENGILL.

HEEL NAILING MACHINE.

APPLICATION FILED JUNE 4, I918.

Patentd Aug. 15, 1922.

Jcd. 7.

ATTORNEY n A a canal Ani GEOR-GE M. PETTENGILL, OF I-IAVERI-IILL, MASSACHUSETTS, ASSIGNOR TO HAME]. SHOE liIACHINERY COMPANY, A CUEPORJQTEON LIASSACE'USETTS;

HEEL-NAILING MACHINE.

Application filed June 4, 1918.

To all whom it may concern:

Be it known that I, GEORGE M. PETTEN- GILL, a citizen of the United States, residing at Haverhill, in the county of Essex and State of Massachusetts, have invented certain new and useful Improvements in Heel- Nailing Machines, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to certain improve.- ments in heel nailing machines in which means is provided for applying cement or glue to a heel lift preparatory to the nailing operation and more particularly to improvements in a cement-applying device such as is illustrated in the patent to Pettengill, 1.150,S50,0ctober 12, 1915.

In mechanisms of the above type, the top ift to which cement is to be applied and which is thereafter spanked onto the pro ecting heads of the heel-attaching nails, is

placed by the operator in a suitable holder carried by the reciprocating cross head of the machine. As the cross head descends, the top lift thus held moves down into contact with the surface of a suitable cementapplying roll and in wiping over the same becomes coated with cement. The roll employed is supported for free turning movement in a cement pot or container and is caused to turn by frictional contact with the top lift as the latter wipes thereover thus keeping the surface of the roll con stautly coated with cement. In the patouted device a pawl and ratchet is employed to prevent retrograde movement of the roll which might occur on the upward movement of the cross head by contact of parts carried thereby with the roll.

The arrangement above described operates in an entirely satisfactory manner when top lifts of usual sizes are employed, but it is found in practice that when the machine is operating upon the small lifts employed in connection with heels of the Louis type, the frictional engagement thereof with the cementing roll is insufficient always to insure rotation of the latter, the vis osity of the cement into which the roll dips exerting); a braking action thereon which it re quires an appreciable force to overcome.

Specification of Letters Patent.

Patent-ed Ari 15, was.

Serial No. 238,087.

The invention provides a cementing attachment for use with nailing machines of that type employing a reciprocating cross read provided with a top lift holder, said attachment comprising a rotary cement-mp plying member and means independent of said top lift holder and having connection to said cross head for intermittently rotating said cement-applying member.

Other and further objects and advantages of the invention together with new and improved details of construction will be hereinafter more fully described and particularly pointed out in the claims, reference being had to the accompanying drawings fora full disclosure of a preferred embodiment thereof and in which,

Fig. l is a front, diagrammatic elevation of so much of the upper portion of a heel nailing machine as 1s necessary to illustrate the application of this invention thereto, the cross head being shown as at the upper limit of its stroke,

F 2 is plan view of the attachment to enlarged scale, and

i'f' 3 is a side elevation, partly in section, of the attachment, to the same scale as in Fig. 2, illustrating the arrangement of the ope ating mechanism, the parts occupying the position which they assume at the lower limit of movement of the cross head.

1 indicates a portion of the main frame of the machine provided with suitable guideways for a pair of vertically slidable rods 2, of which only one is illustrated, said rods baring mounted upon their upper ends a vertically reciprocable cross head 3. d: is a turret rotatably mounted upon the cross head, said turret providing a pair of divergent arms 5 and 6, carrying at their respective outer extremities a top-lift holder 7 and a driver member 8. The turret is further provided with a pair of spaced apart notches 9 and 10 adapted for engagement by a slidable bolt 11 whereby the turret may be locked in position with either the top-lift holder or the nail driver in position for operation. The above described mechanism all of a character well known in the art, and therefore unnecessary.

further detail description thereof is.

As herein shown a top-lift tray 12 is fixed to the frame member 1 at a convenient point i thereon, said tray being provided at its inner extremity with a downwardly depending lug 13, to which a horizontally disposed arm 1 1 is piyotully connected. 14-." a rod de pendingfrom the tray 12 and passing through an opening in the arm let, said rod being provided with ahead uponlits lower extremity and having); a spring 1 1" :inter posed betuuien said head and the arm 14-, whereby said arm is resiliently supported in proper POSltlOll. "the arm 14-. is provided at its free extremity with a socket. 15 in rocted screw-threaded pins 20, which may be held in proper adjusted position by means oi' lock nuts, it desired. Said pins and 21 'are sofjormed at their opposite extremities as to provide pintle hearings for a shaft 522 freely rotatable thereon, the shaft 22 constituting a support for a r0112?) the surface of which may be royered'with :liclt or other suitable material, as illustrated at 24. J

The shaft 22, aslierein shown, is screw threaded throughoi'it its length," and has "mounted thereon near one end a collar serving toposltlon the roll 23 thereon, the roll beingheld in fixedrelation to the shaft and against said collar by means of a nut 26. 27 is a ratchet wheel herein shown as integral with the collar 25, said ratchet wheel being adapted for engagement with thepawl 28-fiaed to the cement-holding re ceptacle, this pawl and ratchet being providedto prevent retrograde movement of the roll The;devi.ce thus far described is similar in character to that shown in the patent to lettengill, above noted, and is capable o1 operation in the same manner, it being;

noted, however, that under certain circumstances the device as thus constructed Tails to function properly.

arms and 32. y by means of a pin 33, is a pawl 34-, said pawl bein guidedwithin a slot formed in the upper edge of said cement receptacle, and

29 is a lug formed upon the rearportion of the cement receptacle, said lug having; pivoted thereon a bell-crank lever 30 having Pivoted to the arm 32,

having its free extremity shaped to en gage the teeth of a second ratchet wheel 36 fast to the-shaft 92 and adiacei'itthe wheel As herein shown, said wheels 2-7 and 36 andthe collar are integral, but it is clearly evident tluit it within the scope ol. the

invention to form said elements independently and to fix them to the shaft in any desired manner. The receptacle 17 may, if desired, be provided with an adjustable stop member 30? for engagement by the arm 231 of hell crankv 80 to limit the downward movement of the same. l

37 is a rod connected at the point 38 to the free extremity of the arm 31 of hell crank 30, said rod being guided at its upper portion by passing; through an opening; 39 in a stud 4:0 projecting outwardly from the forward face of the cross head 3. The upper extremity oi rod 87 is screw threaded, as shown at ll, for the reception oi. the nut 42 which may be held in adjusted-position by .means of a suitable lock nut.

Inter-posed between nut 4-2 and the stud 10 is a coil spring 43, the upper'extremity of which is connected, in any desired'manner, to the nut d9, this, however, not being essential, asit is permissible toallow this spring to slide freely upon therod 37.

The ope "ation of the above mechanism is EI-S Zl OllOWS, the parts being initially posi tioned asshown in Fig. 1. i l reparatorft to "theuiailing stroke of the cross head, the

holder 7 lSPl'OVlClQtl with atop lift inthc usual mani'ierpanrl as the cross head moves dowmvardly such top lift in descending wipes over the surface of the felt-covered roll 23 causing the latter to rotateand at the same time coating the surface of the top litt with the cement carried by said roll. The frictional engagement of the top lift with the roll is usually su'liicient to turn the roll thereby to provide the roll with a fresh coating of the cement after each operation. During such movement of the roll the pawl il l will move freelyover the ratchet teeth of the wheel 36, and at the same time the p wl will move over the teeth of the Ar) ratchet 27.

lVhen. employing top hits or Very small size, it sometimes tound that the frictioi'ial engagement of the same wit-lithe roll is iusuilicient to turn the latter to the proper amount to insure a fresh coating" m": the ceinent upon the felt covering thereotl, and. the devices constituting; the present invention operate in the following mam'ier to overcome this dilliciiilty. As the cross head moves downward, the stud carried there by alsoinoves downwardly permitting the rod 37 to drop to a slight citent, carrying with it the bell-crank lever3O and reti'act ing the pawl 34, theparts thus moving until the bcll-crank lever is stopped by engagement of arm 31 with stop meinbcn d0. whereupon stud 4:0 continues its downward iovement sliding freely on rod 37.

Upon upward movement oil? the cross head the stud 4 will engage the lower extremity of spring; =l-3 just prior to reaching the upward limit or its stroke and will thus,

through compression of the spring, cause an upward movement of rod 37, thereby turning bell-crank lever 30 and moving pawl 3 1 forwardly to cause a partial rotation of the roll 23. The roll is thus caused, upon each up-strolre of the cross head, to move a sufficient distance to insure proper coating thereof with cement, this action being entirely independent of the size or thickness of the top lift carried by the top-lift holder,

t will be observed that the attachment constituting the present invention does not in any manner interfere with the operation of the roll as described in the above noted patent to Pettengill, but forms merely an auxiliary device adapted, under certain circumstances, to insure proper turning of the roll whereby to provide the latter with a constant and uniform supply of cement.

t is to be understood that various modifications and changes in the structure shown could be made without departing from the present invention, the embodiment of the invention herein illustrated being shown by way of example and not by way of limitation.

The term heel lift employed in the appended claims is intended to cover either an entire heel or any part thereof as it will be obvious from the above description that many features of the present invention may be embodied in a device for applying cement to entire heels as well as to the toplifts thereof.

Having now thus described the invention and a preferred embodiment thereof, together with the mode of operation of the same what I claim and desire to secure by Letters Patent of the United States is,-

1. In a heeling machine, a vertically reciprocating heel-lift holder adapt-ed to support a heel-lift in a position oblique to the v rtical and facing downward, a cementa-pplying device arranged directly in the path of movement of the lift as it is carried downward in said position by the holder, and means independent of said lift, for insuring a constant supply of cement to said cementing device.

2. In a heeling machine a vertically reciprocating cross head and a turret mounted thereon having an arm provieed with a heel-lift holder at its end arranged to hold the lift at right angles to said arm, means for locking the turret in a position in which said arm extends obliquely downward, a retatable cement applier mounted directly be neat-h said holder in position to be engaged bv the lift held thereby on downward movenient of the cross head and means independent of said lift for rotating said cement applier.

In a heeling machine avertically reciprocating carrier lniving a heel-lift holder movably mounted thereon, and means for locking said holder in position to. hold a lift with one side oblique to the vertical and.

facing downward during a downward move ment of the carrier, a cementreccptacle and a roll mounted to rotate therein about a he iroll, a pawl engageable with said ratchet,

andmeans connected to said carrier for actuating said pawl to impart a movement of rotation to said roll on upward movement of said carrier.

5. In a heel nailing machine having a reciprocating cross head, a heel-lift holder carried by the cross head, a relatively fixed cement receptacle having a cementapplying roll rotatably supported therein, a ratchet wheel fast to said roll, a pivotally supported lever member, a pawl connected to one end of said lever member and engageable with said ratchet wheel, and means connecting the other end of said lever member with the cross head whereby movement of the latter serves to rotate said roll.

6. In a heel'nailing machine having a reciprocating cross head, in combination, a relatively fixed cement receptacle, a cementapplying roll rotatably mounted therein and provided with a ratchet wheel fixed thereto, a bell-crank lever -mounted upon said receptacle, a pawl pivoted toone arm of said lever and engaging said ratchet, a rod having operative engagement with other arm of said lever and means carried by the cross head for reciprocating said rod,

7. In a heel nailing machine having a reciprocable cross head, in combination, a cement-applying device mounted to rotate in relatively fixed bearings and means for intermittently rotating said device comprising a stud projecting from said cross head and having a guide opening therein, a rod slidable in said guide opening, a nut having screw-threaded engagement with the free extremity of said rod, and resilient means tending to move said nut away from said stud.

8. In a machine of the class described having a reciprocating element, in combina tion, a relatively fixed fluid container, a fluid-applying roll rotatably supporte l within said container, a ratchet fixed to sa roll, a pawl engaging said ratchet, and means for actuating said pawl for rotating other arm of said lever, a stucPpI'ojecfiing from Sibld. reciprooa-tlng element and pro vided with a guide opening for said rod, an

adjustable stop member fixed i1po1i= the fl eo extremity ofaid rod, and a coiled spring surrounding said rod and'iooated between said stop memberiand said stud.

In testimony whereof, I have signed my name to this specification.

GEORGE NLPETT I ILLJ 

